Compact Disc

A 4.72 inch disc developed by Sony and Philips that can
store, on the same disc, still and/or moving images in
monochrome and/or color; stereo or two separate sound tracks
integrated with and/or separate from the images; and digital
program and information files.

The same fabrication process is used to make both audio CDs
and CD-ROMs for storing computer data, the only difference
is in the device used to read the CD (the player or drive).